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MQL5 indicator buffer random valuesDuring my coding of an indicator random values would end up in the index buffer if one would switch time frames.
It took me a few hours to figure out that if I didn't explicitly set an empty value this would cause this to happen - so the solution is to always set a value during your OnCalculate() loop both for your empty bars and not.
/*
OnCalculate
===========
Called only in custom indicators when it's necessary to calculate the indicator values by the Calculate event.
*/
int OnCalculate(const int iRatesTotal,
const int iPreviousCalculated
,const datetime &time[]
,const double &aOpen[]
,const double &aHigh[]
,const double &aLow[]
,const double &aClose[]
,const long &tick_volume[]
,const long &volume[]
,const int &spread[])
{
Print(">>> OnCalculate(): `iRatesTotal=" + iRatesTotal + "`, `iPreviousCalculated=" + iPreviousCalculated + "`");
//int iStart…